RN131 Series

This product is not recommended for new designs-consider using the [**RNWF02**](https://www.microchip.com/en-us/product/rnwf02pc)as an alternative. View our [**RN Wi-Fi Migration Guide**](https://microchip.my.site.com/s/article/KB-000014336-RN-Wi-Fi-Module-Migration-Guide) for more information on making the transition. **Important Note:** We assessed the RN131 against the new RED Directive EN 300 328 v2.2.2 standard and the module cannot meet this new standard due to new, more rigorous test limits with which the radio cannot meet the minimum performance criterion. This means that going forward, the device is not compliant for operation within countries that require this standard. Firmware version 4.83 provides fixes for the Key Reinstallation attack or 'Krack' vulnerability. The [Firmware](https://ww1.microchip.com/downloads/en/DeviceDoc/wifly3-483.zip) and [Release Notes](https://ww1.microchip.com/downloads/en/DeviceDoc/Release_Notes_RN171_RN131_v4%2083.pdf) are available under the Documentation tab. The RN131 is a full-featured 802.11 b/g Wi-Fi module, and a complete, ultra-low power embedded TCP/IP solution. The combination of ultra-low power and the ability to wake up, connect to a wireless network, send data, and return to sleep mode in less than 100 milliseconds, allows the RN131 to run for years on two standard AAA batteries. Using only 35mA when awake and 4µA when asleep, this remarkable power efficiency makes possible a new class of internet-enabled products. For evaluating the RN131 module, Microchip offers the [RN-131-EK](https://www.microchip.com/en-us/development-tool/rn-131-ek), an evaluation kit that can be used to quickly add Wi-Fi connectivity to embedded applications. As simple as plugging in a USB drive, it has the flexibility to connect directly to a PC via a standard USB interface or to embedded processors through the TTL/UART interface. Microchip also offers the small form factor 802.11 b/g [RN171](https://www.microchip.com/en-us/product/rn171) Wi-Fi module for embedded Wi-Fi applications. **For the latest firmware details and corresponding part numbers, please visit:** <https://www.microchip.com/en-us/products/wireless-connectivity>